US1749300A - Valve grinder - Google Patents

Description

March 4, 1930. E. H. PETERSON ET AL VALVE GRINDER Filed Aug. 29. 1927 {P tented Mar. 4, 1930 EDWARD: ir-nnnvirnrnnson AND ILLIAM 17L ODLUM,,0'F CHICAGO, ILLINOIS, As-

sren'ons ommo METAL rnonuc'rsfcoivirmvy, F cHIcaG iLLINoIs, A CORPO- YVRATION on iLLiNOIS VALVE GRINDER Appilication filed August 29,1927. Serial No. 216,042".

4 The present invention relates to devices on the, valves ofa types: of motors. 7 '3 Another of the objeotsof our invention is assembly comprising for I grinding or refacingvalves, and particu-' larly valves I employed in of the :poppet type commonly internal combustion engines;

One of the objects of our'invention is the provision'ofa valve grinder-of the classdescribed which is more simple, durable and economical than the valve grinders" of the priorartand which may be constructed-more.

cheaply, comprising a small number of parts an'd means" for ad pting thedevice for use great number of different the provision of a simplified valve grinder a cast metal casing having an integral handle, acover for said cas 1ng,= a novel andsimple' chuck rotatably t tion will appear-mo I mounted in the same,

means for oscillating" said jchuck, and'a crank for, actuating said means; v j iv j, I Other objects and advantagesof our inven-' re fully from the follow-.

, ingdescription and from the accompanying drawings i in which similar characters of reference indicate similar parts throughout the several views.

= valve engaging plate; an

- Referring .to the drawingsinternalmechanism;

grinder with the 5 Fig. 2 is an elevational view of the same on the lines 2-2 of Fig. 1 in partial cross-e section -Fig. 3is'-a detail view of one or thebits and Fig i l is a detail 1 view of "another'valvc nsagm P Referring to Fig, 1, 10 indicates inits en--- valve grinding device which comtirety our prises a, castsmetalcasing 11, having anfinmeg-m1 handle 12, a. rotatable shaft 13 for a of actuatingv mechanism which is indicated in;

i ,q huck adaptedto support a b t Mcar ying a valve engaging plate The casing 11 encloses and supports a simplified assembly ire y y he, numeral 16., l

, I, are :casing 11 is preferably Emma is, small as is possible 'to' enclose 'the 'actuati'ng 'mechanism-- 16', and for this purpose-the cas ,stantially pear shape,

vcrank 30, further to be described.

securing a of the screw a flat wall 17 of subbounded by an up- 18 forming an upper ing may be made with wardly extending wall opening 19 of the same shape. The wall 18 may be appropriately thickened at a plurality of points, such as the points 20, 21 and 22, to provide sufficient material for threaded vapertures 23 employed in securing the cover24 by screw bolts 25; The threaded apertures 23 maybe located at any points which will not interfere with the interior actuating mechanism 16;

- The cover 24 comprises a fiat plate of metal of substantially the same outline as the wall 17 of the casing and adapted to fit'upon the opening 19, being secured upon the casing by, the screw bolts 25 passing through said cover intothe threaded apertures 23. The casing may be formedwith an integral handle 12 at its top, and the handle 12 may be of any convenient shape which will enable the operator to'grasp the to of the casing and exert'a force downward upon the bit 14.

The casing 11 is preferably formed with an outwardly projecting boss 26 extending at right angles to the rear wall 17 and provided with a bore 27 adapted to'form a bearing for I a shaft 28. Fig. l'is an elevational view of our/valve cover removed to show the I The boss 26 also proj ects': slightly into the interior of the casing, as at 29, forming a thrustbearing inside the casing for a The shaft 28 comprises a substantially cylindrical memberadapted to fit the bore 27 and having a reduced outer end31 which is threaded to receive a'threaded collar 32 and a crank 33 1 having a'threaded aperture 34. The reduced end 31' on the shaft 28 forms a shoulder against which the collar 32 may be screwed to fix this collar on the shaft 28 and the crank 33 may act like a locknut against the collar 32 securely fastening the crank upon the shaft28. Y I r v The crank 33 comprises a strip of sheet metal of appropriate length having the threaded aperture 34 at one end to fit the re duccd end 31, and a second threaded aperture 36 at the opposite end adapted vto fit thethreaded end'37 of a screw bolt for rotatably knob 38on said crank. The head bolt 37 may be prevented from binding against the knob 38 providing a limited thread on the bolt 37 so that itcannot be threaded in far enough to pinch the knob' 38.

Theca sing 11 is also formediwitli a downwardly extending boss-39 extending from the bottom of the easing at substantially right angles to the bearing 27 and provided with an enlarged bore 40 and a counterbore 41.

The boss 39 also project-supwardinto the.

larged bore 40 is also provided with second washer 46,,- and a plurality of ball bearings .47. are confined between 4,6 to provide an antirtriction thrust bearing for the shaft 13. The lower end of the shaft 13 is provided with a slot 48 and is threaded,

the inner trusto-conical provided with a bore the washers and as at49, to receivethe internally threaded sleeve The slot48 should preferably eX- tend to such a distance that the split portions of the shaft13 may be cammed together by sleeve 50, and the split end of the shaft 13 is 52adapted to the reduced end 53. of a bit 14.

The sleeve 50 comprises a substantially cylindrical member having an outer knurled surface 54 andan internally threadod'surfacef55, as well as the TIUSlQOrCOIllCfil surface end of the shaft 13, asat 57, may be further reduced, remov ng the threads 49. and taper-' ing the end of the shaft to frusto-conical form .40 also prov ded with a to fitv wi hin the surface 5-1.' The shaft 13 is and traversing the here The bit, 14 comprises drica'l metalmember having endb3torming a 52at its upper end. a substantially cylinareduced upper maybe milled away'as at to provide a non-circular end 6lwhioh will just pass the pin 58 and prevent relative rotation between the bit 14 and the shaft113. The non circular portion 61 maybe tapered so astocome into wedging thus be observed that the reduced end 53 may be inserted through the aperture 56 in the sleeve 50 into the bore 52 untilthe non-circu- V lar end 61engages the pin 58'; after which the sleeve 50 may be threaded on theshaftgl, the

frusto-eonical surface 51' camming the. two split ends of the shaft together to clamp the reduced end 5370f the-bit, The simple chuck thusprovided may be manufactured at a very low cost and with a minimumof machining operations.

' and bore 66 securing surface 51 of the 51 terminating in the bore. 56. The extreme ing a pini pin 58 riveted the-reinlimiting shoulder 59, and the-extreme end of the'reduced portion- 53 engagement, with the pin'58. Itwill The, lower end: of the-bit. 14 is provided witha sl-,0t,..a -a 62,5, adaptedto receive; a plu-,

rality of plates 15, 63 and 64 of varyingsizes" All of the plates motors of difierent types.

15,63 and 64 are provided with central apertures 65 adapted to registerwith a bore 66 passing through theendof the shaft lid-across the slot 62; The plates may be stamped from. sheet metal to the various shapes and sizes shown, and the upperfiat edge 67oftheplate shouldengagethe base of theslot62 when the cotter pin 68 passes hrough theapertures Referring to Fig.1, the plate 15 is substantially rectangularat its upper end, tapering atits lower e-nd 69 somewhat after the manner of a screw-driven; and I the lower vend is adapted to engage in a slot 7 0 in thevalve .71; e 1 1M95 f intended o ng g w hvalves of larger size, being' of substantiallyreetang-ular shape with-outwardly extending lugs 72 at one sidespaeed as far as possible and outwardly extending lugss73 onthe op,- posite side spaced, a les se r diStance a ap ed ofit ad 'feli e ltttyp of,valve.' In a similar. manner theplafie64 has a pair of lugs 74 on one side spaced a distance greater: than spaced still more than the lugs 74; thereby p ng a-se e of valve engaging members which: are adapted to fit valves of: practically any commercial intern l combustion engine;

these parts together. I

and;

that of the lugs 7 2, while the lugs 75, are

The v evise- .al o prele bly; provid d wi h a PPerlend fthesheftwlaisr duced;

'ngash ulder 78 f0riS PP rt as a 7. p

erably flattened'on onesilde asat 80, and the.

' Thereducedcend 77; iszpre'f pinion 7 9 may comprise a stamped sheet metal member having; teeth 81. and? a central, aper-* ture with a complementary flattened side.

The end shaft may be-"further re duced and threadedto receive. aniinternally threadednut 83-a-ndthe-pinion79 isrprefery s cur d by means. of said nut: with a Washer 84. I I The; wall 17 of. the casing" maybe provid d withanother boss 85:1having a: threaded bore 7 8,6; and'projecting in the casing as at-87 to form a thrust bearing for a segmental gear 7. l .88. The segmental'gear- 88 'comprises a stamped sheet,metali-inember having a plurality' of teeth 89" which are",v complementaryg the te fih l Ofthe pinion vand having a bore 90 located at the center ol curvaturef I The segmental gear88: may be rotatably supported in'the casing by a screw bolt 91 having. a reduced threaded portion 92am an annular:

shoulder-'68. Theshouldertlid is adaptedjto, 1

th inward h adi g mev m n of? he o t. .1 so: th t the gearz88 is: rotatably sup-.1

. arted n the boltwithout being n between the head and the boss 87.

' the crankSO are both procompressed The gear88 and vided with countersunk apertures 94 which are adapted to receive bolts 95 of similar shape to the bolt 91.' The bolts 95 pass through a sheet metal link 96 into the counotersunk bores 30, respectively, and when.thebolts 95 have 94fon the gear 88 and crank been riveted in the counterbores they provide a pivotal connection for these parts Which will not bind thelink. The crank 30 may also I be provided with acountersu'nk bore 97 which is adapted to receive 1,

I the reduced end 9 8 of the shaft 28, the end of the shaft being riveted in said bore to fix the crank on'said shaft. The link 96 issli'ghtly curved in order to avoid interference with the casing at 21 and 7 -with the'screw bolt 91.

' The assembly of the foregoing parts will be obvious to one skilled in the art, but a con-' venient methodof assembly is to perform the riveting operations which secure the shaft andgear 88 together first, after-which these'parts may be placed in the casing and secured by thebolt 91. The

, shaft 13 may then be assembled with its ball on the gear is 7 length of the i valve grinding devices of specific embodiment.

,o bearing in the bore 41 and H cured on the end of the'shaft follows: The grinder appropriate bit and fit the valves of the tor, and an appropriate valve grinding comp :The val I inthe slotin the valve and bearing down upon the pinion 79 se by the nut83.

The operation of our valve grinder is as is provided with an valve engaging plate to, internal, combustion mopound maybe applied to the valve seat 99. ve engaging plate 15 may be placed J thehandle 12,'the mechanismgmay be operated by; rotating the crank 33 It is obvious thatthe crank 30 will impart an oscillating I motion to the segmental gear 88 because the distance between the bolt91 and the rivet 95 crank 30. Th

cillatingfmotion to, the shaft 13 and valve 71,

irotating the valve back and forth upon its seat and grinding away the irregularities of the valve and seatgto produce a good fit.

' While we are aware that'many complicated the-class described have been made, most of these devices embody so many different parts that they are difficult and expensive to manufacture and asi assembly semble, and we have provided a simplified of mechanical elements and structure which will perform the operation efii ciently;and economically and which may be manufacturedat a very small cost.

- WVhilewe have illustrated and described a of our invention, many modifications may be made without departing from thespirit of the invention, and we do if not wish to be limited to the precise details of" the construction set forth, but desire to substantially greater than the e segmental gear will engage the pinion-79 and impart an os-' avail ourselves of all changes within the scope 1 of the appended claim.

Having thus described our invention, what we claimas new and desire to secure by LettersPatent of the United States is:

In a valve grinder, the combination of an elongated supporting casing having a pair of transverse bores with a rotatably mounted in one of said bores and extending in the direction of the longitudinal axis of the'casing, a'counterbore about said shaft, a pair of Washers in said counterbore, ball bearings between said washers in said counterbore, an annular shoulder carried by said shaft for engaging one of said washers, a pinion carried by said shaft in said casing, a sheet metal segmental gear having radial teeth on its periphery rotatably mounted in said casing in vertical position to engage said pinion at right angles thereto, a second shaft rotatably mounted in the other bore of said casing, a crank lever fixedly secured to said second shaft, a crank for actuating said second shaft, pivot posts riveted to said crank lever and to said segmental gear, and a connecting link pivotally secured to said crank lever and said segmental gear by said pivot posts, said crank lever being of less length than the radial distance of the pivot post on said segmental gear from the axis of said segmental gear. 7

In witness whereof, we hereunto subscribe our names this 26 day of August, 1927.

EDWARD HENRY PETERSON. WILLIAM H. ODLUM.

valve actuating shaft 8

Images